2 * Copyright (c) 2014 Chelsio Communications, Inc.
4 * Written by: Navdeep Parhar <np@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
32 #include "opt_inet6.h"
35 #include <sys/param.h>
37 #include <sys/eventhandler.h>
40 #include <sys/module.h>
41 #include <sys/selinfo.h>
42 #include <sys/socket.h>
43 #include <sys/sockio.h>
44 #include <machine/bus.h>
45 #include <net/ethernet.h>
47 #include <net/if_media.h>
48 #include <net/if_var.h>
49 #include <net/if_clone.h>
50 #include <net/if_types.h>
51 #include <net/netmap.h>
52 #include <dev/netmap/netmap_kern.h>
54 #include "common/common.h"
55 #include "common/t4_regs.h"
56 #include "common/t4_regs_values.h"
58 extern int fl_pad; /* XXXNM */
61 * 0 = normal netmap rx
63 * 2 = supermassive black hole (buffer packing enabled)
66 SYSCTL_INT(_hw_cxgbe, OID_AUTO, nm_black_hole, CTLFLAG_RWTUN, &black_hole, 0,
67 "Sink incoming packets.");
70 SYSCTL_INT(_hw_cxgbe, OID_AUTO, nm_rx_ndesc, CTLFLAG_RWTUN,
71 &rx_ndesc, 0, "# of rx descriptors after which the hw cidx is updated.");
74 SYSCTL_INT(_hw_cxgbe, OID_AUTO, nm_rx_nframes, CTLFLAG_RWTUN,
75 &rx_nframes, 0, "max # of frames received before waking up netmap rx.");
77 int holdoff_tmr_idx = 2;
78 SYSCTL_INT(_hw_cxgbe, OID_AUTO, nm_holdoff_tmr_idx, CTLFLAG_RWTUN,
79 &holdoff_tmr_idx, 0, "Holdoff timer index for netmap rx queues.");
83 * -1: no congestion feedback (not recommended).
84 * 0: backpressure the channel instead of dropping packets right away.
85 * 1: no backpressure, drop packets for the congested queue immediately.
87 static int nm_cong_drop = 1;
88 SYSCTL_INT(_hw_cxgbe, OID_AUTO, nm_cong_drop, CTLFLAG_RWTUN,
90 "Congestion control for netmap rx queues (0 = backpressure, 1 = drop");
93 SYSCTL_INT(_hw_cxgbe, OID_AUTO, starve_fl, CTLFLAG_RWTUN,
94 &starve_fl, 0, "Don't ring fl db for netmap rx queues.");
97 * Try to process tx credits in bulk. This may cause a delay in the return of
98 * tx credits and is suitable for bursty or non-stop tx only.
100 int lazy_tx_credit_flush = 1;
101 SYSCTL_INT(_hw_cxgbe, OID_AUTO, lazy_tx_credit_flush, CTLFLAG_RWTUN,
102 &lazy_tx_credit_flush, 0, "lazy credit flush for netmap tx queues.");
105 * Split the netmap rx queues into two groups that populate separate halves of
106 * the RSS indirection table. This allows filters with hashmask to steer to a
107 * particular group of queues.
109 static int nm_split_rss = 0;
110 SYSCTL_INT(_hw_cxgbe, OID_AUTO, nm_split_rss, CTLFLAG_RWTUN,
111 &nm_split_rss, 0, "Split the netmap rx queues into two groups.");
114 * netmap(4) says "netmap does not use features such as checksum offloading, TCP
115 * segmentation offloading, encryption, VLAN encapsulation/decapsulation, etc."
116 * but this knob can be used to get the hardware to checksum all tx traffic
119 static int nm_txcsum = 0;
120 SYSCTL_INT(_hw_cxgbe, OID_AUTO, nm_txcsum, CTLFLAG_RWTUN,
121 &nm_txcsum, 0, "Enable transmit checksum offloading.");
124 alloc_nm_rxq_hwq(struct vi_info *vi, struct sge_nm_rxq *nm_rxq, int cong)
128 struct adapter *sc = vi->adapter;
129 struct sge_params *sp = &sc->params.sge;
130 struct netmap_adapter *na = NA(vi->ifp);
134 MPASS(nm_rxq->iq_desc != NULL);
135 MPASS(nm_rxq->fl_desc != NULL);
137 bzero(nm_rxq->iq_desc, vi->qsize_rxq * IQ_ESIZE);
138 bzero(nm_rxq->fl_desc, na->num_rx_desc * EQ_ESIZE + sp->spg_len);
140 bzero(&c, sizeof(c));
141 c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_IQ_CMD) | F_FW_CMD_REQUEST |
142 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_IQ_CMD_PFN(sc->pf) |
144 c.alloc_to_len16 = htobe32(F_FW_IQ_CMD_ALLOC | F_FW_IQ_CMD_IQSTART |
146 MPASS(!forwarding_intr_to_fwq(sc));
147 KASSERT(nm_rxq->intr_idx < sc->intr_count,
148 ("%s: invalid direct intr_idx %d", __func__, nm_rxq->intr_idx));
149 v = V_FW_IQ_CMD_IQANDSTINDEX(nm_rxq->intr_idx);
150 c.type_to_iqandstindex = htobe32(v |
151 V_FW_IQ_CMD_TYPE(FW_IQ_TYPE_FL_INT_CAP) |
152 V_FW_IQ_CMD_VIID(vi->viid) |
153 V_FW_IQ_CMD_IQANUD(X_UPDATEDELIVERY_INTERRUPT));
154 c.iqdroprss_to_iqesize = htobe16(V_FW_IQ_CMD_IQPCIECH(vi->pi->tx_chan) |
155 F_FW_IQ_CMD_IQGTSMODE |
156 V_FW_IQ_CMD_IQINTCNTTHRESH(0) |
157 V_FW_IQ_CMD_IQESIZE(ilog2(IQ_ESIZE) - 4));
158 c.iqsize = htobe16(vi->qsize_rxq);
159 c.iqaddr = htobe64(nm_rxq->iq_ba);
161 c.iqns_to_fl0congen = htobe32(F_FW_IQ_CMD_IQFLINTCONGEN |
162 V_FW_IQ_CMD_FL0CNGCHMAP(cong) | F_FW_IQ_CMD_FL0CONGCIF |
163 F_FW_IQ_CMD_FL0CONGEN);
165 c.iqns_to_fl0congen |=
166 htobe32(V_FW_IQ_CMD_FL0HOSTFCMODE(X_HOSTFCMODE_NONE) |
167 F_FW_IQ_CMD_FL0FETCHRO | F_FW_IQ_CMD_FL0DATARO |
168 (fl_pad ? F_FW_IQ_CMD_FL0PADEN : 0) |
169 (black_hole == 2 ? F_FW_IQ_CMD_FL0PACKEN : 0));
170 c.fl0dcaen_to_fl0cidxfthresh =
171 htobe16(V_FW_IQ_CMD_FL0FBMIN(chip_id(sc) <= CHELSIO_T5 ?
172 X_FETCHBURSTMIN_128B : X_FETCHBURSTMIN_64B_T6) |
173 V_FW_IQ_CMD_FL0FBMAX(chip_id(sc) <= CHELSIO_T5 ?
174 X_FETCHBURSTMAX_512B : X_FETCHBURSTMAX_256B));
175 c.fl0size = htobe16(na->num_rx_desc / 8 + sp->spg_len / EQ_ESIZE);
176 c.fl0addr = htobe64(nm_rxq->fl_ba);
178 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c);
180 device_printf(sc->dev,
181 "failed to create netmap ingress queue: %d\n", rc);
186 MPASS(nm_rxq->iq_sidx == vi->qsize_rxq - sp->spg_len / IQ_ESIZE);
187 nm_rxq->iq_gen = F_RSPD_GEN;
188 nm_rxq->iq_cntxt_id = be16toh(c.iqid);
189 nm_rxq->iq_abs_id = be16toh(c.physiqid);
190 cntxt_id = nm_rxq->iq_cntxt_id - sc->sge.iq_start;
191 if (cntxt_id >= sc->sge.niq) {
192 panic ("%s: nm_rxq->iq_cntxt_id (%d) more than the max (%d)",
193 __func__, cntxt_id, sc->sge.niq - 1);
195 sc->sge.iqmap[cntxt_id] = (void *)nm_rxq;
197 nm_rxq->fl_cntxt_id = be16toh(c.fl0id);
198 nm_rxq->fl_pidx = nm_rxq->fl_cidx = 0;
199 nm_rxq->fl_db_saved = 0;
200 /* matches the X_FETCHBURSTMAX_512B or X_FETCHBURSTMAX_256B above. */
201 nm_rxq->fl_db_threshold = chip_id(sc) <= CHELSIO_T5 ? 8 : 4;
202 MPASS(nm_rxq->fl_sidx == na->num_rx_desc);
203 cntxt_id = nm_rxq->fl_cntxt_id - sc->sge.eq_start;
204 if (cntxt_id >= sc->sge.neq) {
205 panic("%s: nm_rxq->fl_cntxt_id (%d) more than the max (%d)",
206 __func__, cntxt_id, sc->sge.neq - 1);
208 sc->sge.eqmap[cntxt_id] = (void *)nm_rxq;
210 nm_rxq->fl_db_val = V_QID(nm_rxq->fl_cntxt_id) |
211 sc->chip_params->sge_fl_db;
213 if (chip_id(sc) >= CHELSIO_T5 && cong >= 0) {
216 param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) |
217 V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DMAQ_CONM_CTXT) |
218 V_FW_PARAMS_PARAM_YZ(nm_rxq->iq_cntxt_id);
219 param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) |
220 V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DMAQ_CONM_CTXT) |
221 V_FW_PARAMS_PARAM_YZ(nm_rxq->iq_cntxt_id);
226 for (i = 0; i < 4; i++) {
228 val |= 1 << (i << 2);
232 rc = -t4_set_params(sc, sc->mbox, sc->pf, 0, 1, ¶m, &val);
234 /* report error but carry on */
235 device_printf(sc->dev,
236 "failed to set congestion manager context for "
237 "ingress queue %d: %d\n", nm_rxq->iq_cntxt_id, rc);
241 t4_write_reg(sc, sc->sge_gts_reg,
242 V_INGRESSQID(nm_rxq->iq_cntxt_id) |
243 V_SEINTARM(V_QINTR_TIMER_IDX(holdoff_tmr_idx)));
249 free_nm_rxq_hwq(struct vi_info *vi, struct sge_nm_rxq *nm_rxq)
251 struct adapter *sc = vi->adapter;
254 rc = -t4_iq_free(sc, sc->mbox, sc->pf, 0, FW_IQ_TYPE_FL_INT_CAP,
255 nm_rxq->iq_cntxt_id, nm_rxq->fl_cntxt_id, 0xffff);
257 device_printf(sc->dev, "%s: failed for iq %d, fl %d: %d\n",
258 __func__, nm_rxq->iq_cntxt_id, nm_rxq->fl_cntxt_id, rc);
259 nm_rxq->iq_cntxt_id = INVALID_NM_RXQ_CNTXT_ID;
264 alloc_nm_txq_hwq(struct vi_info *vi, struct sge_nm_txq *nm_txq)
268 struct adapter *sc = vi->adapter;
269 struct netmap_adapter *na = NA(vi->ifp);
270 struct fw_eq_eth_cmd c;
273 MPASS(nm_txq->desc != NULL);
275 len = na->num_tx_desc * EQ_ESIZE + sc->params.sge.spg_len;
276 bzero(nm_txq->desc, len);
278 bzero(&c, sizeof(c));
279 c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_EQ_ETH_CMD) | F_FW_CMD_REQUEST |
280 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_ETH_CMD_PFN(sc->pf) |
281 V_FW_EQ_ETH_CMD_VFN(0));
282 c.alloc_to_len16 = htobe32(F_FW_EQ_ETH_CMD_ALLOC |
283 F_FW_EQ_ETH_CMD_EQSTART | FW_LEN16(c));
284 c.autoequiqe_to_viid = htobe32(F_FW_EQ_ETH_CMD_AUTOEQUIQE |
285 F_FW_EQ_ETH_CMD_AUTOEQUEQE | V_FW_EQ_ETH_CMD_VIID(vi->viid));
287 htobe32(V_FW_EQ_ETH_CMD_HOSTFCMODE(X_HOSTFCMODE_NONE) |
288 V_FW_EQ_ETH_CMD_PCIECHN(vi->pi->tx_chan) | F_FW_EQ_ETH_CMD_FETCHRO |
289 V_FW_EQ_ETH_CMD_IQID(sc->sge.nm_rxq[nm_txq->iqidx].iq_cntxt_id));
291 htobe32(V_FW_EQ_ETH_CMD_FBMIN(chip_id(sc) <= CHELSIO_T5 ?
292 X_FETCHBURSTMIN_64B : X_FETCHBURSTMIN_64B_T6) |
293 V_FW_EQ_ETH_CMD_FBMAX(X_FETCHBURSTMAX_512B) |
294 V_FW_EQ_ETH_CMD_EQSIZE(len / EQ_ESIZE));
295 c.eqaddr = htobe64(nm_txq->ba);
297 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c);
299 device_printf(vi->dev,
300 "failed to create netmap egress queue: %d\n", rc);
304 nm_txq->cntxt_id = G_FW_EQ_ETH_CMD_EQID(be32toh(c.eqid_pkd));
305 cntxt_id = nm_txq->cntxt_id - sc->sge.eq_start;
306 if (cntxt_id >= sc->sge.neq)
307 panic("%s: nm_txq->cntxt_id (%d) more than the max (%d)", __func__,
308 cntxt_id, sc->sge.neq - 1);
309 sc->sge.eqmap[cntxt_id] = (void *)nm_txq;
311 nm_txq->pidx = nm_txq->cidx = 0;
312 MPASS(nm_txq->sidx == na->num_tx_desc);
313 nm_txq->equiqidx = nm_txq->equeqidx = nm_txq->dbidx = 0;
315 nm_txq->doorbells = sc->doorbells;
316 if (isset(&nm_txq->doorbells, DOORBELL_UDB) ||
317 isset(&nm_txq->doorbells, DOORBELL_UDBWC) ||
318 isset(&nm_txq->doorbells, DOORBELL_WCWR)) {
319 uint32_t s_qpp = sc->params.sge.eq_s_qpp;
320 uint32_t mask = (1 << s_qpp) - 1;
321 volatile uint8_t *udb;
323 udb = sc->udbs_base + UDBS_DB_OFFSET;
324 udb += (nm_txq->cntxt_id >> s_qpp) << PAGE_SHIFT;
325 nm_txq->udb_qid = nm_txq->cntxt_id & mask;
326 if (nm_txq->udb_qid >= PAGE_SIZE / UDBS_SEG_SIZE)
327 clrbit(&nm_txq->doorbells, DOORBELL_WCWR);
329 udb += nm_txq->udb_qid << UDBS_SEG_SHIFT;
332 nm_txq->udb = (volatile void *)udb;
339 free_nm_txq_hwq(struct vi_info *vi, struct sge_nm_txq *nm_txq)
341 struct adapter *sc = vi->adapter;
344 rc = -t4_eth_eq_free(sc, sc->mbox, sc->pf, 0, nm_txq->cntxt_id);
346 device_printf(sc->dev, "%s: failed for eq %d: %d\n", __func__,
347 nm_txq->cntxt_id, rc);
348 nm_txq->cntxt_id = INVALID_NM_TXQ_CNTXT_ID;
353 cxgbe_netmap_simple_rss(struct adapter *sc, struct vi_info *vi,
354 struct ifnet *ifp, struct netmap_adapter *na)
356 struct netmap_kring *kring;
357 struct sge_nm_rxq *nm_rxq;
358 int rc, i, j, nm_state, defq;
362 * Check if there's at least one active (or about to go active) netmap
366 for_each_nm_rxq(vi, j, nm_rxq) {
367 nm_state = atomic_load_int(&nm_rxq->nm_state);
368 kring = na->rx_rings[nm_rxq->nid];
369 if ((nm_state != NM_OFF && !nm_kring_pending_off(kring)) ||
370 (nm_state == NM_OFF && nm_kring_pending_on(kring))) {
371 MPASS(nm_rxq->iq_cntxt_id != INVALID_NM_RXQ_CNTXT_ID);
373 defq = nm_rxq->iq_abs_id;
380 /* No active netmap queues. Switch back to NIC queues. */
384 for (i = 0; i < vi->rss_size;) {
385 for_each_nm_rxq(vi, j, nm_rxq) {
386 nm_state = atomic_load_int(&nm_rxq->nm_state);
387 kring = na->rx_rings[nm_rxq->nid];
388 if ((nm_state != NM_OFF &&
389 !nm_kring_pending_off(kring)) ||
390 (nm_state == NM_OFF &&
391 nm_kring_pending_on(kring))) {
392 MPASS(nm_rxq->iq_cntxt_id !=
393 INVALID_NM_RXQ_CNTXT_ID);
394 vi->nm_rss[i++] = nm_rxq->iq_abs_id;
395 if (i == vi->rss_size)
403 rc = -t4_config_rss_range(sc, sc->mbox, vi->viid, 0, vi->rss_size, rss,
406 if_printf(ifp, "netmap rss_config failed: %d\n", rc);
408 rc = -t4_config_vi_rss(sc, sc->mbox, vi->viid, vi->hashen, defq, 0, 0);
410 if_printf(ifp, "netmap defaultq config failed: %d\n", rc);
417 * Odd number of rx queues work best for split RSS mode as the first queue can
418 * be dedicated for non-RSS traffic and the rest divided into two equal halves.
421 cxgbe_netmap_split_rss(struct adapter *sc, struct vi_info *vi,
422 struct ifnet *ifp, struct netmap_adapter *na)
424 struct netmap_kring *kring;
425 struct sge_nm_rxq *nm_rxq;
426 int rc, i, j, nm_state, defq;
427 int nactive[2] = {0, 0};
428 int dq[2] = {-1, -1};
429 bool dq_norss; /* default queue should not be in RSS table. */
431 MPASS(nm_split_rss != 0);
432 MPASS(vi->nnmrxq > 1);
434 for_each_nm_rxq(vi, i, nm_rxq) {
435 j = i / ((vi->nnmrxq + 1) / 2);
436 nm_state = atomic_load_int(&nm_rxq->nm_state);
437 kring = na->rx_rings[nm_rxq->nid];
438 if ((nm_state != NM_OFF && !nm_kring_pending_off(kring)) ||
439 (nm_state == NM_OFF && nm_kring_pending_on(kring))) {
440 MPASS(nm_rxq->iq_cntxt_id != INVALID_NM_RXQ_CNTXT_ID);
443 dq[j] = nm_rxq->iq_abs_id;
449 if (nactive[0] == 0 || nactive[1] == 0)
450 return (cxgbe_netmap_simple_rss(sc, vi, ifp, na));
452 MPASS(dq[0] != -1 && dq[1] != -1);
453 if (nactive[0] > nactive[1]) {
456 } else if (nactive[0] < nactive[1]) {
465 nm_rxq = &sc->sge.nm_rxq[vi->first_nm_rxq];
466 while (i < vi->rss_size / 2) {
467 for (j = 0; j < (vi->nnmrxq + 1) / 2; j++) {
468 nm_state = atomic_load_int(&nm_rxq[j].nm_state);
469 kring = na->rx_rings[nm_rxq[j].nid];
470 if ((nm_state == NM_OFF &&
471 !nm_kring_pending_on(kring)) ||
472 (nm_state == NM_ON &&
473 nm_kring_pending_off(kring))) {
476 MPASS(nm_rxq[j].iq_cntxt_id != INVALID_NM_RXQ_CNTXT_ID);
477 if (dq_norss && defq == nm_rxq[j].iq_abs_id)
479 vi->nm_rss[i++] = nm_rxq[j].iq_abs_id;
480 if (i == vi->rss_size / 2)
484 while (i < vi->rss_size) {
485 for (j = (vi->nnmrxq + 1) / 2; j < vi->nnmrxq; j++) {
486 nm_state = atomic_load_int(&nm_rxq[j].nm_state);
487 kring = na->rx_rings[nm_rxq[j].nid];
488 if ((nm_state == NM_OFF &&
489 !nm_kring_pending_on(kring)) ||
490 (nm_state == NM_ON &&
491 nm_kring_pending_off(kring))) {
494 MPASS(nm_rxq[j].iq_cntxt_id != INVALID_NM_RXQ_CNTXT_ID);
495 if (dq_norss && defq == nm_rxq[j].iq_abs_id)
497 vi->nm_rss[i++] = nm_rxq[j].iq_abs_id;
498 if (i == vi->rss_size)
503 rc = -t4_config_rss_range(sc, sc->mbox, vi->viid, 0, vi->rss_size,
504 vi->nm_rss, vi->rss_size);
506 if_printf(ifp, "netmap split_rss_config failed: %d\n", rc);
508 rc = -t4_config_vi_rss(sc, sc->mbox, vi->viid, vi->hashen, defq, 0, 0);
510 if_printf(ifp, "netmap defaultq config failed: %d\n", rc);
516 cxgbe_netmap_rss(struct adapter *sc, struct vi_info *vi, struct ifnet *ifp,
517 struct netmap_adapter *na)
520 if (nm_split_rss == 0 || vi->nnmrxq == 1)
521 return (cxgbe_netmap_simple_rss(sc, vi, ifp, na));
523 return (cxgbe_netmap_split_rss(sc, vi, ifp, na));
527 cxgbe_netmap_on(struct adapter *sc, struct vi_info *vi, struct ifnet *ifp,
528 struct netmap_adapter *na)
530 struct netmap_slot *slot;
531 struct netmap_kring *kring;
532 struct sge_nm_rxq *nm_rxq;
533 struct sge_nm_txq *nm_txq;
535 struct rx_buf_info *rxb;
537 ASSERT_SYNCHRONIZED_OP(sc);
538 MPASS(vi->nnmrxq > 0);
539 MPASS(vi->nnmtxq > 0);
541 if ((vi->flags & VI_INIT_DONE) == 0 ||
542 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
543 if_printf(ifp, "cannot enable netmap operation because "
544 "interface is not UP.\n");
548 rxb = &sc->sge.rx_buf_info[0];
549 for (i = 0; i < SW_ZONE_SIZES; i++, rxb++) {
550 if (rxb->size1 == NETMAP_BUF_SIZE(na)) {
554 if (rxb->size2 == NETMAP_BUF_SIZE(na)) {
559 if (i >= SW_ZONE_SIZES) {
560 if_printf(ifp, "no hwidx for netmap buffer size %d.\n",
561 NETMAP_BUF_SIZE(na));
565 /* Must set caps before calling netmap_reset */
566 nm_set_native_flags(na);
568 for_each_nm_rxq(vi, i, nm_rxq) {
569 kring = na->rx_rings[nm_rxq->nid];
570 if (!nm_kring_pending_on(kring) ||
571 nm_rxq->iq_cntxt_id != INVALID_NM_RXQ_CNTXT_ID)
574 alloc_nm_rxq_hwq(vi, nm_rxq, tnl_cong(vi->pi, nm_cong_drop));
575 nm_rxq->fl_hwidx = hwidx;
576 slot = netmap_reset(na, NR_RX, i, 0);
577 MPASS(slot != NULL); /* XXXNM: error check, not assert */
579 /* We deal with 8 bufs at a time */
580 MPASS((na->num_rx_desc & 7) == 0);
581 MPASS(na->num_rx_desc == nm_rxq->fl_sidx);
582 for (j = 0; j < nm_rxq->fl_sidx; j++) {
585 PNMB(na, &slot[j], &ba);
587 nm_rxq->fl_desc[j] = htobe64(ba | hwidx);
589 j = nm_rxq->fl_pidx = nm_rxq->fl_sidx - 8;
591 j /= 8; /* driver pidx to hardware pidx */
593 t4_write_reg(sc, sc->sge_kdoorbell_reg,
594 nm_rxq->fl_db_val | V_PIDX(j));
596 (void) atomic_cmpset_int(&nm_rxq->nm_state, NM_OFF, NM_ON);
599 for_each_nm_txq(vi, i, nm_txq) {
600 kring = na->tx_rings[nm_txq->nid];
601 if (!nm_kring_pending_on(kring) ||
602 nm_txq->cntxt_id != INVALID_NM_TXQ_CNTXT_ID)
605 alloc_nm_txq_hwq(vi, nm_txq);
606 slot = netmap_reset(na, NR_TX, i, 0);
607 MPASS(slot != NULL); /* XXXNM: error check, not assert */
610 if (vi->nm_rss == NULL) {
611 vi->nm_rss = malloc(vi->rss_size * sizeof(uint16_t), M_CXGBE,
615 return (cxgbe_netmap_rss(sc, vi, ifp, na));
619 cxgbe_netmap_off(struct adapter *sc, struct vi_info *vi, struct ifnet *ifp,
620 struct netmap_adapter *na)
622 struct netmap_kring *kring;
623 int rc, i, nm_state, nactive;
624 struct sge_nm_txq *nm_txq;
625 struct sge_nm_rxq *nm_rxq;
627 ASSERT_SYNCHRONIZED_OP(sc);
628 MPASS(vi->nnmrxq > 0);
629 MPASS(vi->nnmtxq > 0);
631 if (!nm_netmap_on(na))
634 if ((vi->flags & VI_INIT_DONE) == 0)
637 /* First remove the queues that are stopping from the RSS table. */
638 rc = cxgbe_netmap_rss(sc, vi, ifp, na);
640 return (rc); /* error message logged already. */
642 for_each_nm_txq(vi, i, nm_txq) {
643 struct sge_qstat *spg = (void *)&nm_txq->desc[nm_txq->sidx];
645 kring = na->tx_rings[nm_txq->nid];
646 if (!nm_kring_pending_off(kring) ||
647 nm_txq->cntxt_id == INVALID_NM_TXQ_CNTXT_ID)
650 /* Wait for hw pidx to catch up ... */
651 while (be16toh(nm_txq->pidx) != spg->pidx)
654 /* ... and then for the cidx. */
655 while (spg->pidx != spg->cidx)
658 free_nm_txq_hwq(vi, nm_txq);
660 /* XXX: netmap, not the driver, should do this. */
661 kring->rhead = kring->rcur = kring->nr_hwcur = 0;
662 kring->rtail = kring->nr_hwtail = kring->nkr_num_slots - 1;
665 for_each_nm_rxq(vi, i, nm_rxq) {
666 nm_state = atomic_load_int(&nm_rxq->nm_state);
667 kring = na->rx_rings[nm_rxq->nid];
668 if (nm_state != NM_OFF && !nm_kring_pending_off(kring))
670 if (nm_state == NM_OFF || !nm_kring_pending_off(kring))
673 MPASS(nm_rxq->iq_cntxt_id != INVALID_NM_RXQ_CNTXT_ID);
674 while (!atomic_cmpset_int(&nm_rxq->nm_state, NM_ON, NM_OFF))
677 free_nm_rxq_hwq(vi, nm_rxq);
679 /* XXX: netmap, not the driver, should do this. */
680 kring->rhead = kring->rcur = kring->nr_hwcur = 0;
681 kring->rtail = kring->nr_hwtail = 0;
683 netmap_krings_mode_commit(na, 0);
685 nm_clear_native_flags(na);
691 cxgbe_netmap_reg(struct netmap_adapter *na, int on)
693 struct ifnet *ifp = na->ifp;
694 struct vi_info *vi = ifp->if_softc;
695 struct adapter *sc = vi->adapter;
698 rc = begin_synchronized_op(sc, vi, SLEEP_OK | INTR_OK, "t4nmreg");
702 rc = cxgbe_netmap_on(sc, vi, ifp, na);
704 rc = cxgbe_netmap_off(sc, vi, ifp, na);
705 end_synchronized_op(sc, 0);
710 /* How many packets can a single type1 WR carry in n descriptors */
712 ndesc_to_npkt(const int n)
715 MPASS(n > 0 && n <= SGE_MAX_WR_NDESC);
719 #define MAX_NPKT_IN_TYPE1_WR (ndesc_to_npkt(SGE_MAX_WR_NDESC))
722 * Space (in descriptors) needed for a type1 WR (TX_PKTS or TX_PKTS2) that
726 npkt_to_ndesc(const int n)
729 MPASS(n > 0 && n <= MAX_NPKT_IN_TYPE1_WR);
731 return ((n + 2) / 2);
735 * Space (in 16B units) needed for a type1 WR (TX_PKTS or TX_PKTS2) that
739 npkt_to_len16(const int n)
742 MPASS(n > 0 && n <= MAX_NPKT_IN_TYPE1_WR);
747 #define NMIDXDIFF(q, idx) IDXDIFF((q)->pidx, (q)->idx, (q)->sidx)
750 ring_nm_txq_db(struct adapter *sc, struct sge_nm_txq *nm_txq)
753 u_int db = nm_txq->doorbells;
755 MPASS(nm_txq->pidx != nm_txq->dbidx);
757 n = NMIDXDIFF(nm_txq, dbidx);
759 clrbit(&db, DOORBELL_WCWR);
762 switch (ffs(db) - 1) {
764 *nm_txq->udb = htole32(V_QID(nm_txq->udb_qid) | V_PIDX(n));
767 case DOORBELL_WCWR: {
768 volatile uint64_t *dst, *src;
771 * Queues whose 128B doorbell segment fits in the page do not
772 * use relative qid (udb_qid is always 0). Only queues with
773 * doorbell segments can do WCWR.
775 KASSERT(nm_txq->udb_qid == 0 && n == 1,
776 ("%s: inappropriate doorbell (0x%x, %d, %d) for nm_txq %p",
777 __func__, nm_txq->doorbells, n, nm_txq->pidx, nm_txq));
779 dst = (volatile void *)((uintptr_t)nm_txq->udb +
780 UDBS_WR_OFFSET - UDBS_DB_OFFSET);
781 src = (void *)&nm_txq->desc[nm_txq->dbidx];
782 while (src != (void *)&nm_txq->desc[nm_txq->dbidx + 1])
789 *nm_txq->udb = htole32(V_QID(nm_txq->udb_qid) | V_PIDX(n));
794 t4_write_reg(sc, sc->sge_kdoorbell_reg,
795 V_QID(nm_txq->cntxt_id) | V_PIDX(n));
798 nm_txq->dbidx = nm_txq->pidx;
802 * Write work requests to send 'npkt' frames and ring the doorbell to send them
803 * on their way. No need to check for wraparound.
806 cxgbe_nm_tx(struct adapter *sc, struct sge_nm_txq *nm_txq,
807 struct netmap_kring *kring, int npkt, int npkt_remaining)
809 struct netmap_ring *ring = kring->ring;
810 struct netmap_slot *slot;
811 const u_int lim = kring->nkr_num_slots - 1;
812 struct fw_eth_tx_pkts_wr *wr = (void *)&nm_txq->desc[nm_txq->pidx];
815 struct cpl_tx_pkt_core *cpl;
816 struct ulptx_sgl *usgl;
820 n = min(npkt, MAX_NPKT_IN_TYPE1_WR);
823 wr = (void *)&nm_txq->desc[nm_txq->pidx];
824 wr->op_pkd = nm_txq->op_pkd;
825 wr->equiq_to_len16 = htobe32(V_FW_WR_LEN16(npkt_to_len16(n)));
829 cpl = (void *)(wr + 1);
831 for (i = 0; i < n; i++) {
832 slot = &ring->slot[kring->nr_hwcur];
833 PNMB(kring->na, slot, &ba);
836 cpl->ctrl0 = nm_txq->cpl_ctrl0;
838 cpl->len = htobe16(slot->len);
839 cpl->ctrl1 = nm_txcsum ? 0 :
840 htobe64(F_TXPKT_IPCSUM_DIS | F_TXPKT_L4CSUM_DIS);
842 usgl = (void *)(cpl + 1);
843 usgl->cmd_nsge = htobe32(V_ULPTX_CMD(ULP_TX_SC_DSGL) |
845 usgl->len0 = htobe32(slot->len);
846 usgl->addr0 = htobe64(ba);
848 slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED);
849 cpl = (void *)(usgl + 1);
850 MPASS(slot->len + len <= UINT16_MAX);
852 kring->nr_hwcur = nm_next(kring->nr_hwcur, lim);
854 wr->plen = htobe16(len);
857 nm_txq->pidx += npkt_to_ndesc(n);
858 MPASS(nm_txq->pidx <= nm_txq->sidx);
859 if (__predict_false(nm_txq->pidx == nm_txq->sidx)) {
861 * This routine doesn't know how to write WRs that wrap
862 * around. Make sure it wasn't asked to.
868 if (npkt == 0 && npkt_remaining == 0) {
870 if (lazy_tx_credit_flush == 0) {
871 wr->equiq_to_len16 |= htobe32(F_FW_WR_EQUEQ |
873 nm_txq->equeqidx = nm_txq->pidx;
874 nm_txq->equiqidx = nm_txq->pidx;
876 ring_nm_txq_db(sc, nm_txq);
880 if (NMIDXDIFF(nm_txq, equiqidx) >= nm_txq->sidx / 2) {
881 wr->equiq_to_len16 |= htobe32(F_FW_WR_EQUEQ |
883 nm_txq->equeqidx = nm_txq->pidx;
884 nm_txq->equiqidx = nm_txq->pidx;
885 } else if (NMIDXDIFF(nm_txq, equeqidx) >= 64) {
886 wr->equiq_to_len16 |= htobe32(F_FW_WR_EQUEQ);
887 nm_txq->equeqidx = nm_txq->pidx;
889 if (NMIDXDIFF(nm_txq, dbidx) >= 2 * SGE_MAX_WR_NDESC)
890 ring_nm_txq_db(sc, nm_txq);
893 /* Will get called again. */
894 MPASS(npkt_remaining);
897 /* How many contiguous free descriptors starting at pidx */
899 contiguous_ndesc_available(struct sge_nm_txq *nm_txq)
902 if (nm_txq->cidx > nm_txq->pidx)
903 return (nm_txq->cidx - nm_txq->pidx - 1);
904 else if (nm_txq->cidx > 0)
905 return (nm_txq->sidx - nm_txq->pidx);
907 return (nm_txq->sidx - nm_txq->pidx - 1);
911 reclaim_nm_tx_desc(struct sge_nm_txq *nm_txq)
913 struct sge_qstat *spg = (void *)&nm_txq->desc[nm_txq->sidx];
914 uint16_t hw_cidx = spg->cidx; /* snapshot */
915 struct fw_eth_tx_pkts_wr *wr;
918 hw_cidx = be16toh(hw_cidx);
920 while (nm_txq->cidx != hw_cidx) {
921 wr = (void *)&nm_txq->desc[nm_txq->cidx];
923 MPASS(wr->op_pkd == htobe32(V_FW_WR_OP(FW_ETH_TX_PKTS_WR)) ||
924 wr->op_pkd == htobe32(V_FW_WR_OP(FW_ETH_TX_PKTS2_WR)));
925 MPASS(wr->type == 1);
926 MPASS(wr->npkt > 0 && wr->npkt <= MAX_NPKT_IN_TYPE1_WR);
929 nm_txq->cidx += npkt_to_ndesc(wr->npkt);
932 * We never sent a WR that wrapped around so the credits coming
933 * back, WR by WR, should never cause the cidx to wrap around
936 MPASS(nm_txq->cidx <= nm_txq->sidx);
937 if (__predict_false(nm_txq->cidx == nm_txq->sidx))
945 cxgbe_netmap_txsync(struct netmap_kring *kring, int flags)
947 struct netmap_adapter *na = kring->na;
948 struct ifnet *ifp = na->ifp;
949 struct vi_info *vi = ifp->if_softc;
950 struct adapter *sc = vi->adapter;
951 struct sge_nm_txq *nm_txq = &sc->sge.nm_txq[vi->first_nm_txq + kring->ring_id];
952 const u_int head = kring->rhead;
954 int n, d, npkt_remaining, ndesc_remaining;
957 * Tx was at kring->nr_hwcur last time around and now we need to advance
958 * to kring->rhead. Note that the driver's pidx moves independent of
959 * netmap's kring->nr_hwcur (pidx counts descriptors and the relation
960 * between descriptors and frames isn't 1:1).
963 npkt_remaining = head >= kring->nr_hwcur ? head - kring->nr_hwcur :
964 kring->nkr_num_slots - kring->nr_hwcur + head;
965 while (npkt_remaining) {
966 reclaimed += reclaim_nm_tx_desc(nm_txq);
967 ndesc_remaining = contiguous_ndesc_available(nm_txq);
968 /* Can't run out of descriptors with packets still remaining */
969 MPASS(ndesc_remaining > 0);
971 /* # of desc needed to tx all remaining packets */
972 d = (npkt_remaining / MAX_NPKT_IN_TYPE1_WR) * SGE_MAX_WR_NDESC;
973 if (npkt_remaining % MAX_NPKT_IN_TYPE1_WR)
974 d += npkt_to_ndesc(npkt_remaining % MAX_NPKT_IN_TYPE1_WR);
976 if (d <= ndesc_remaining)
979 /* Can't send all, calculate how many can be sent */
980 n = (ndesc_remaining / SGE_MAX_WR_NDESC) *
981 MAX_NPKT_IN_TYPE1_WR;
982 if (ndesc_remaining % SGE_MAX_WR_NDESC)
983 n += ndesc_to_npkt(ndesc_remaining % SGE_MAX_WR_NDESC);
986 /* Send n packets and update nm_txq->pidx and kring->nr_hwcur */
988 cxgbe_nm_tx(sc, nm_txq, kring, n, npkt_remaining);
990 MPASS(npkt_remaining == 0);
991 MPASS(kring->nr_hwcur == head);
992 MPASS(nm_txq->dbidx == nm_txq->pidx);
995 * Second part: reclaim buffers for completed transmissions.
997 if (reclaimed || flags & NAF_FORCE_RECLAIM || nm_kr_txempty(kring)) {
998 reclaimed += reclaim_nm_tx_desc(nm_txq);
999 kring->nr_hwtail += reclaimed;
1000 if (kring->nr_hwtail >= kring->nkr_num_slots)
1001 kring->nr_hwtail -= kring->nkr_num_slots;
1008 cxgbe_netmap_rxsync(struct netmap_kring *kring, int flags)
1010 struct netmap_adapter *na = kring->na;
1011 struct netmap_ring *ring = kring->ring;
1012 struct ifnet *ifp = na->ifp;
1013 struct vi_info *vi = ifp->if_softc;
1014 struct adapter *sc = vi->adapter;
1015 struct sge_nm_rxq *nm_rxq = &sc->sge.nm_rxq[vi->first_nm_rxq + kring->ring_id];
1016 u_int const head = kring->rhead;
1018 int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR;
1021 return (0); /* No updates ever. */
1023 if (netmap_no_pendintr || force_update) {
1024 kring->nr_hwtail = atomic_load_acq_32(&nm_rxq->fl_cidx);
1025 kring->nr_kflags &= ~NKR_PENDINTR;
1028 if (nm_rxq->fl_db_saved > 0 && starve_fl == 0) {
1030 t4_write_reg(sc, sc->sge_kdoorbell_reg,
1031 nm_rxq->fl_db_val | V_PIDX(nm_rxq->fl_db_saved));
1032 nm_rxq->fl_db_saved = 0;
1035 /* Userspace done with buffers from kring->nr_hwcur to head */
1036 n = head >= kring->nr_hwcur ? head - kring->nr_hwcur :
1037 kring->nkr_num_slots - kring->nr_hwcur + head;
1040 u_int fl_pidx = nm_rxq->fl_pidx;
1041 struct netmap_slot *slot = &ring->slot[fl_pidx];
1043 int i, dbinc = 0, hwidx = nm_rxq->fl_hwidx;
1046 * We always deal with 8 buffers at a time. We must have
1047 * stopped at an 8B boundary (fl_pidx) last time around and we
1048 * must have a multiple of 8B buffers to give to the freelist.
1050 MPASS((fl_pidx & 7) == 0);
1051 MPASS((n & 7) == 0);
1053 IDXINCR(kring->nr_hwcur, n, kring->nkr_num_slots);
1054 IDXINCR(nm_rxq->fl_pidx, n, nm_rxq->fl_sidx2);
1057 for (i = 0; i < 8; i++, fl_pidx++, slot++) {
1058 PNMB(na, slot, &ba);
1060 nm_rxq->fl_desc[fl_pidx] = htobe64(ba | hwidx);
1061 slot->flags &= ~NS_BUF_CHANGED;
1062 MPASS(fl_pidx <= nm_rxq->fl_sidx2);
1065 if (fl_pidx == nm_rxq->fl_sidx2) {
1067 slot = &ring->slot[0];
1069 if (++dbinc == nm_rxq->fl_db_threshold) {
1072 nm_rxq->fl_db_saved += dbinc;
1074 t4_write_reg(sc, sc->sge_kdoorbell_reg,
1075 nm_rxq->fl_db_val | V_PIDX(dbinc));
1080 MPASS(nm_rxq->fl_pidx == fl_pidx);
1085 nm_rxq->fl_db_saved += dbinc;
1087 t4_write_reg(sc, sc->sge_kdoorbell_reg,
1088 nm_rxq->fl_db_val | V_PIDX(dbinc));
1097 cxgbe_nm_attach(struct vi_info *vi)
1099 struct port_info *pi;
1101 struct netmap_adapter na;
1103 MPASS(vi->nnmrxq > 0);
1104 MPASS(vi->ifp != NULL);
1109 bzero(&na, sizeof(na));
1112 na.na_flags = NAF_BDG_MAYSLEEP;
1114 /* Netmap doesn't know about the space reserved for the status page. */
1115 na.num_tx_desc = vi->qsize_txq - sc->params.sge.spg_len / EQ_ESIZE;
1118 * The freelist's cidx/pidx drives netmap's rx cidx/pidx. So
1119 * num_rx_desc is based on the number of buffers that can be held in the
1120 * freelist, and not the number of entries in the iq. (These two are
1121 * not exactly the same due to the space taken up by the status page).
1123 na.num_rx_desc = rounddown(vi->qsize_rxq, 8);
1124 na.nm_txsync = cxgbe_netmap_txsync;
1125 na.nm_rxsync = cxgbe_netmap_rxsync;
1126 na.nm_register = cxgbe_netmap_reg;
1127 na.num_tx_rings = vi->nnmtxq;
1128 na.num_rx_rings = vi->nnmrxq;
1129 na.rx_buf_maxsize = MAX_MTU;
1130 netmap_attach(&na); /* This adds IFCAP_NETMAP to if_capabilities */
1134 cxgbe_nm_detach(struct vi_info *vi)
1137 MPASS(vi->nnmrxq > 0);
1138 MPASS(vi->ifp != NULL);
1140 netmap_detach(vi->ifp);
1143 static inline const void *
1144 unwrap_nm_fw6_msg(const struct cpl_fw6_msg *cpl)
1147 MPASS(cpl->type == FW_TYPE_RSSCPL || cpl->type == FW6_TYPE_RSSCPL);
1149 /* data[0] is RSS header */
1150 return (&cpl->data[1]);
1154 handle_nm_sge_egr_update(struct adapter *sc, struct ifnet *ifp,
1155 const struct cpl_sge_egr_update *egr)
1158 struct sge_nm_txq *nm_txq;
1160 oq = be32toh(egr->opcode_qid);
1161 MPASS(G_CPL_OPCODE(oq) == CPL_SGE_EGR_UPDATE);
1162 nm_txq = (void *)sc->sge.eqmap[G_EGR_QID(oq) - sc->sge.eq_start];
1164 netmap_tx_irq(ifp, nm_txq->nid);
1168 service_nm_rxq(struct sge_nm_rxq *nm_rxq)
1170 struct vi_info *vi = nm_rxq->vi;
1171 struct adapter *sc = vi->adapter;
1172 struct ifnet *ifp = vi->ifp;
1173 struct netmap_adapter *na = NA(ifp);
1174 struct netmap_kring *kring = na->rx_rings[nm_rxq->nid];
1175 struct netmap_ring *ring = kring->ring;
1176 struct iq_desc *d = &nm_rxq->iq_desc[nm_rxq->iq_cidx];
1181 uint32_t fl_cidx = atomic_load_acq_32(&nm_rxq->fl_cidx);
1182 u_int fl_credits = fl_cidx & 7;
1183 u_int ndesc = 0; /* desc processed since last cidx update */
1184 u_int nframes = 0; /* frames processed since last netmap wakeup */
1186 while ((d->rsp.u.type_gen & F_RSPD_GEN) == nm_rxq->iq_gen) {
1190 lq = be32toh(d->rsp.pldbuflen_qid);
1191 opcode = d->rss.opcode;
1194 switch (G_RSPD_TYPE(d->rsp.u.type_gen)) {
1195 case X_RSPD_TYPE_FLBUF:
1199 case X_RSPD_TYPE_CPL:
1200 MPASS(opcode < NUM_CPL_CMDS);
1205 cpl = unwrap_nm_fw6_msg(cpl);
1207 case CPL_SGE_EGR_UPDATE:
1208 handle_nm_sge_egr_update(sc, ifp, cpl);
1211 ring->slot[fl_cidx].len = G_RSPD_LEN(lq) -
1212 sc->params.sge.fl_pktshift;
1213 ring->slot[fl_cidx].flags = 0;
1215 if (!(lq & F_RSPD_NEWBUF)) {
1216 MPASS(black_hole == 2);
1220 if (__predict_false(++fl_cidx == nm_rxq->fl_sidx))
1224 panic("%s: unexpected opcode 0x%x on nm_rxq %p",
1225 __func__, opcode, nm_rxq);
1229 case X_RSPD_TYPE_INTR:
1230 /* Not equipped to handle forwarded interrupts. */
1231 panic("%s: netmap queue received interrupt for iq %u\n",
1235 panic("%s: illegal response type %d on nm_rxq %p",
1236 __func__, G_RSPD_TYPE(d->rsp.u.type_gen), nm_rxq);
1240 if (__predict_false(++nm_rxq->iq_cidx == nm_rxq->iq_sidx)) {
1241 nm_rxq->iq_cidx = 0;
1242 d = &nm_rxq->iq_desc[0];
1243 nm_rxq->iq_gen ^= F_RSPD_GEN;
1246 if (__predict_false(++nframes == rx_nframes) && !black_hole) {
1247 atomic_store_rel_32(&nm_rxq->fl_cidx, fl_cidx);
1248 netmap_rx_irq(ifp, nm_rxq->nid, &work);
1252 if (__predict_false(++ndesc == rx_ndesc)) {
1253 if (black_hole && fl_credits >= 8) {
1255 IDXINCR(nm_rxq->fl_pidx, fl_credits * 8,
1257 t4_write_reg(sc, sc->sge_kdoorbell_reg,
1258 nm_rxq->fl_db_val | V_PIDX(fl_credits));
1259 fl_credits = fl_cidx & 7;
1261 t4_write_reg(sc, sc->sge_gts_reg,
1263 V_INGRESSQID(nm_rxq->iq_cntxt_id) |
1264 V_SEINTARM(V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX)));
1269 atomic_store_rel_32(&nm_rxq->fl_cidx, fl_cidx);
1272 IDXINCR(nm_rxq->fl_pidx, fl_credits * 8, nm_rxq->fl_sidx);
1273 t4_write_reg(sc, sc->sge_kdoorbell_reg,
1274 nm_rxq->fl_db_val | V_PIDX(fl_credits));
1275 } else if (nframes > 0)
1276 netmap_rx_irq(ifp, nm_rxq->nid, &work);
1278 t4_write_reg(sc, sc->sge_gts_reg, V_CIDXINC(ndesc) |
1279 V_INGRESSQID((u32)nm_rxq->iq_cntxt_id) |
1280 V_SEINTARM(V_QINTR_TIMER_IDX(holdoff_tmr_idx)));